Blue Swirl wrote: > On 4/16/08, Anthony Liguori <[EMAIL PROTECTED]> wrote: > >> This patch introduces a DMA API and plumbs support through the DMA layer. We >> use a mostly opaque structure, IOVector to represent a scatter/gather list >> of >> physical memory. Associated with each IOVector is a read/write function and >> an opaque pointer. This allows arbitrary transformation/mapping of the >> data while providing an easy mechanism to short-cut the zero-copy case >> in the block/net backends. >> > > This looks much better also for Sparc uses. I converted pcnet to use > the IOVectors (see patch), it does not work yet but looks doable. >
Excellent! > IMHO the read/write functions should be a property of the bus so that > they are hidden from the device, for pcnet it does not matter as we > have to do the swapping anyway. > For an IOMMU that has a per-device mapping, the read/write functions have to operate on a per-device basis. Regards, Anthony Liguori ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
